The Hip: Preservation, Replacement and Revision

QRS wave: Discussion


- AXIS: 
- 29 to + 100; 
- Normal QRS axis if R > S in both I and aVF; 
- Transition Zone: Between V3 - V4; 
- S wave > 5 mm in V1; 
- Short and Fat patients: more Leftward; 
- Tall and Thin: more Verticle to Rightward; 
- Pediatrics: Larger S wave in Chest Leads; * DURATION: Adults: usually < 0.08 sec; - 0.09 - 0.11 sec: Slight Intra Vent Conduction Delay; - Look for other EKG abnormalities; 
- Consider LVH, HyperK, quinidine, Procainamide
- Left Anterior Hemi Block 
- Greater than 0.12 sec: Consider Bundle Branch Block; * Poor R Wave Progression: 
- COPD - LVH (w/ Post Hypertrophy) - Ant MI



Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Monday, December 19, 2011 3:21 pm